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【单选题】
考察知识点【齐次线性方程组有非零解的条件】A.
B.
C.
D.
D
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反馈参考答案：
举一反三
【简答题】A bag is useful and the word “bag” is useful, too. Here is an interesting phrase（短语）, “to let the cat out of the bag”. In meaning it is the same as “to tell the secret（秘密）”. And there is an old intere...
【单选题】Was it worth reading?
A.
No, it was too difficult.
B.
Yes, it was useful.
C.
No, it was too dull.
【单选题】The production of too many useful things results ______ too many useless people.
A.
from
B.
out
C.
up
D.
in
【简答题】293K的水在内径为50mm的直管内流动,流速为1m/s,试计算雷诺数,并判断流动形态。
【单选题】Peter prided himself on never getting ( ) involved in his life.
A.
physically
B.
psychologically
C.
emotionally
D.
intelligently
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